chart = {
const width = window.innerWidth * 0.8;
const height = 200;
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.attr("width", width)
.attr("height", height)
.attr("style", "max-width: 100%; height: auto;")
.attr("background-color", "blue");
svg
.selectAll("circle")
.data(d3.range(18))
.join("circle")
.attr("cx", d => 30 + d * 50)
.attr("cy", height / 2)
.attr("r",[1,2,3,4,50,6])
.attr("fill", "lime");
return svg.node();
}